Longitudinal predictors of the overlap between reading and math skills

The predictors of developing reading skill are well known, and there is increasing coherence around predictors of developing math as well. These achievement skills share strong relations. Less knowledge is available regarding the extent to which predictors overlap and predict one another, particularly longitudinally, and across different types of reading and math. We followed kindergarten students (n = 193) for one year, evaluating a range of relevant predictor skills in kindergarten, and a range of relevant achievement outcomes (core, fluency, complex) of reading and math in grade 1. Few predictors differentially predicted math versus reading with some exception (phonological awareness and rapid naming for reading; counting knowledge for math). The pattern was more similar for core and fluency outcomes relative to complex ones. A small set of predictors accounted for much of the overlap among math and reading outcomes, regardless of type (core, fluency, or complex). Results have the potential to inform the development of early screening tools to consider both achievement domains simultaneously, and support the importance of following students identified as at-risk in one domain for their performance in both domains.